422253521 has 2 divisors, whose sum is σ = 422253522. Its totient is φ = 422253520.

The previous prime is 422253493. The next prime is 422253539. The reversal of 422253521 is 125352224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418775296 + 3478225 = 20464^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 422253521 - 2¹⁰ = 422252497 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (422253571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211126760 + 211126761.

It is an arithmetic number, because the mean of its divisors is an integer number (211126761).

Almost surely, 2^422253521 is an apocalyptic number.

It is an amenable number.

422253521 is a deficient number, since it is larger than the sum of its proper divisors (1).

422253521 is an equidigital number, since it uses as much as digits as its factorization.

422253521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 26.

The square root of 422253521 is about 20548.8082622813. The cubic root of 422253521 is about 750.2242416883.

The spelling of 422253521 in words is "four hundred twenty-two million, two hundred fifty-three thousand, five hundred twenty-one".